Privacy Policy "Last Card"

My app do not collect any information, but I have no way of knowing what libraries that were used are doing exactly. All the libraries that I used in the app are:
androidx.preference:preference:1.1.1
androidx.appcompat:appcompat:1.4.0
com.google.android.material:material:1.4.0
com.google.android.gms:play-services-ads:20.5.0
com.squareup.retrofit2:retrofit:2.7.1
com.squareup.retrofit2:converter-gson:2.7.1
com.google.android.gms:play-services-oss-licenses:17.0.0
androidx.multidex:multidex:2.0.1